AP Psych Unit 0 Vocab 5

perceiving a relationship where none exists, or perceiving a stronger-than-actual relationship.

• illusory correlation

• confirmation bias

• hindsight bias

• sampling bias

the tendency for extreme or unusual scores or events to fall back (regress) toward the average.

• confirmation bias

• regression toward the mean

• placebo effect

• sampling error

a research method in which an investigator manipulates one or more factors (independent variables) to observe the effect on some behavior or mental process (the dependent variable). By random assignment of participants, the experimenter aims to control other relevant factors.

• experiment

• correlational study

• case study

• survey

in an experiment, the group exposed to the treatment — that is, to one version of the independent variable.

• control group

• sample group

• experimental group

• placebo group

in an experiment, the group not exposed to the treatment; contrasts with the experimental group and serves as a comparison for evaluating the effect of the treatment.

• control group

• experimental group

• placebo group

• random group